Wood column



(No Model.)

Patented Sept. 14, i897.

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PATENT ERNST KOLL, OF MIIVAUKEE, lVISCONSIN.

wooo COLUMN.

SPECIFICATION forming part of Letters Patent No. 589,836, dated September 14., 1897. Application filed April l, 1897. Serial No. 63.27l. lNo model.)

To all whom t may concern.-

Be it known that I, ERNST KOLL, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Wood Columns; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, ref.

umns of this kind have usually been madeof sections having their meeting ed ges uniformly beveled, though in some instances the joints have been matched'similar to the matched joints in flooring or a key-piece has been insei-ted.

The object of this invention is to simplify the assembling of the sections of the column, to provide a locked joint, and to secure an extensive gluing-surface.

The invent-ion consists in so forming the several sections of such a column that their joints interlock when alternate sections are forced inwardly, the meeting faces being of such forni lthat the pressure upon these entering sections forces the remaining sections outwardly.

In the drawings, Figure l is a plan section of my improved column, showing theparts assembled and held by a clamp. Fig. 2 is a detail elevation of the column, a portion having been turned to cylindrical form and a portion of one of the sections being broken away; and 3 is a detail edge elevation of one of the sections. t

The column is built up of two sets ot longitudinal sections A B alternately arranged. The meeting edges of these tivo sections are so formed that pressure upon one set, as A,

to force them inwardly, forces the other set,

as B, outwardly and completes the locking of the joints.

The column may be of any desired number of sections. As shown, it is made octagonal, each of the several sections extending through forty-live degrees oi' the circumference of the column and is generally in the form of a section of a Wedge, the outer and inner edges of each of its contacting Jfaces falling upon the same radius of the column. The entering sections A are provided with a longitudinal tongue o' upon each of their contacting faces, these tongues extending inwardly in a direction perpendicular to the cord of the arc sub tended by the section. The inner portion a2 of the contacting faces of these sections are parallel and in planes corresponding to the direction of the tongues, and the outer portions d of these contacting faces are oblique, their planes being upon radii of the column. The conformation of the groove inclosed by the tongue a is not material, but the outer face of the tongue must not be deiiected beyond the perpendicular to the cord in quesv tion. The contacting faces of the sections B are the counterparts of those of sect-ion A and are provided With outwardly-directed tongues l), adapted to enter the `groove inclosed by the tongue o.

In assembling the sections the column is vvbuilt up by commencing with one of the out- Wardly-bearing sections B, and it will be seen that the linal section may be inserted Without diiiculty. When the sections have been assembled, they are forced together by the application of a suitable clamp, such as I have shown, the pressure of the oblique portions oJ of the contacting faces of 4the sections A upon the cooperating portions of the .sections B forces the. latter sections outwardly and causes the firm interlockingof the longitudinal tongues of the two sections.

The clamp shown consists of the links C D, corresponding in number with the sections of which the column is formed, alternate links being provided with bearing-blocks, as E, so that pressure may be applied to the entering sections A and not to the intermediate sections B. One of the links ot the clamps is transversely divided into the portions F G, each of which has a laterally-extending lug to which pressure may be applied by means of a suitable screivthreaded drawbar H and IOO a cooperating nut K. After the glue has set radius, and the ,remaining sections lia-ving the clamp may be removed and the column turned as may loe desired.

I claim as my invention- A column composed of a plurality of oircumferentially-arranged sections, more than four in number, adjacent sect-ions meeting to form joints, the general direction of which follow radii of the column, the contacting faces of alternate sections having inwardlydirected projections inclined away from the outwardly-directed projections inclined away from the radius, the projections of the two sets of sections being adapted to interlock.

In testimony whereof I affixV my signature in presence of two Witnesses.

ERNST KOLL.

\Vtnesses:

FRED C. LORENZ, C. E. ALTER. 

